<template>
  <div>
    根组件
    <h1 v-upper="msg"></h1>
    <jch-button></jch-button>
    <jch-button></jch-button>
  </div>
</template>

<script>
export default {
  name: "",
  data() {
    return {
      msg: "abc",
    };
  },
  mounted() {
    console.log(this.$bus);
  },
};
</script>

<style scoped>
</style>
